Bug Detection & Fix Rate
DebuggingMeasures each tool's ability to identify and fix 12 planted bugs of varying severity in a React + Node.js full-stack application.
Methodology
A full-stack application with 12 intentionally planted bugs was provided: 4 syntax errors, 4 logic errors, and 4 subtle race conditions/security issues. Each tool was given the same instructions to find and fix all bugs. Scored on bugs found, bugs correctly fixed, false positives, and time to complete.
| Tool | Bugs Found (/12)Higher is better | Bugs Fixed (/12)Higher is better | False Positives (count)Lower is better | Time (min)Lower is better |
|---|---|---|---|---|
| Claude Code | 11 | 10 | 1 | 8.5 |
| Cursor | 10 | 9 | 2 | 11 |
| GitHub Copilot | 9 | 8 | 3 | 14 |
| Cline | 9 | 8 | 1 | 15 |
| Devin | 10 | 9 | 2 | 18 |
| Codium / Qodo | 8 | 7 | 0 | 12 |